FR2439513A1 - Modulateur-demodulateur - Google Patents

Modulateur-demodulateur

Info

Publication number
FR2439513A1
FR2439513A1 FR7925922A FR7925922A FR2439513A1 FR 2439513 A1 FR2439513 A1 FR 2439513A1 FR 7925922 A FR7925922 A FR 7925922A FR 7925922 A FR7925922 A FR 7925922A FR 2439513 A1 FR2439513 A1 FR 2439513A1
Authority
FR
France
Prior art keywords
signal
demodulator
modulator
circuit
equalized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7925922A
Other languages
English (en)
Other versions
FR2439513B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Racal Milgo Inc
Original Assignee
Racal Milgo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Racal Milgo Inc filed Critical Racal Milgo Inc
Publication of FR2439513A1 publication Critical patent/FR2439513A1/fr
Application granted granted Critical
Publication of FR2439513B1 publication Critical patent/FR2439513B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
    • H04L7/0058—Detection of the synchronisation error by features other than the received signal transition detection of error based on equalizer tap values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
    • H04L7/0062—Detection of the synchronisation error by features other than the received signal transition detection of error based on data decision error, e.g. Mueller type detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L'INVENTION CONCERNE UN CIRCUIT DESTINE A MAINTENIR UNE SYNCHRONISATION CONVENABLE D'ECHANTILLONNAGE DANS UN MODULATEUR-DEMODULATEUR. DANS CE CIRCUIT, L'ERREUR D'UN EGALISEUR DE CANAL PRINCIPAL EST MISE EN CORRELATION AVEC UN SIGNAL DE CANAL DERIVE POUR PRODUIRE UN SIGNAL DE CORRECTION D'HORLOGE. LE SIGNAL DE CANAL DERIVE EST ETABLI PAR UN EGALISEUR UTILISANT UN NOMBRE DE COEFFICIENTS INFERIEUR A CELUI NECESSAIRE POUR DERIVER LE SIGNAL EGALISE DE CANAL PRINCIPAL, ET LE CALCUL DU SIGNAL DERIVE ET EGALISE ET DU SIGNAL DE CORRECTION D'HORLOGE EST EFFECTUE SEULEMENT POUR UN BAUD SUR DEUX. DOMAINE D'APPLICATION: SYSTEMES DE TRANSMISSION DE DONNEES.
FR7925922A 1978-10-19 1979-10-18 Modulateur-demodulateur Expired FR2439513B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/952,831 US4263671A (en) 1978-10-19 1978-10-19 Sampling clock correction circuit

Publications (2)

Publication Number Publication Date
FR2439513A1 true FR2439513A1 (fr) 1980-05-16
FR2439513B1 FR2439513B1 (fr) 1985-07-12

Family

ID=25493274

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7925922A Expired FR2439513B1 (fr) 1978-10-19 1979-10-18 Modulateur-demodulateur

Country Status (9)

Country Link
US (1) US4263671A (fr)
JP (2) JPS5591240A (fr)
BE (1) BE879541A (fr)
CA (1) CA1128160A (fr)
CH (1) CH648971A5 (fr)
DE (1) DE2942139A1 (fr)
FR (1) FR2439513B1 (fr)
GB (1) GB2034158B (fr)
SE (1) SE436960B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129343A1 (de) * 1981-07-24 1983-02-10 Siemens AG, 1000 Berlin und 8000 München Adaptiver entzerrer fuer digitalsignale
JPH0681167B2 (ja) * 1984-07-28 1994-10-12 富士通株式会社 ディジタル無線通信用の受信装置
US4694414A (en) * 1984-12-19 1987-09-15 Rca Corporation Digital delay interpolation filter with amplitude and phase compensation
JPS6277711A (ja) * 1985-09-30 1987-04-09 Nec Corp 等化器
GB2232852B (en) * 1989-05-31 1993-10-27 Technophone Ltd Offset correction
US5018090A (en) * 1990-03-13 1991-05-21 Rca Licensing Corporation Digital interpolation circuitry

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2234718A2 (fr) * 1973-06-25 1975-01-17 Trt Telecom Radio Electr
US3868603A (en) * 1973-03-09 1975-02-25 Trt Telecom Radio Electr Automatic equalizing arrangement for a data transmission channel
US3878468A (en) * 1974-01-30 1975-04-15 Bell Telephone Labor Inc Joint equalization and carrier recovery adaptation in data transmission systems
FR2250447A5 (fr) * 1973-11-06 1975-05-30 Ibm France
FR2318542A1 (fr) * 1973-03-09 1977-02-11 Trt Telecom Radio Electr Egaliseur autoadaptatif d'un canal de transmission
US4028626A (en) * 1973-01-18 1977-06-07 Hycom Incorporated Digital data receiver with automatic timing recovery and control
US4071827A (en) * 1975-12-09 1978-01-31 Nippon Electric Co., Ltd. Transversal type automatic phase and amplitude equalizer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906347A (en) * 1973-10-11 1975-09-16 Hycom Inc Transversal equalizer for use in double sideband quadrature amplitude modulated system
JPS5941338B2 (ja) * 1976-05-10 1984-10-06 日本電気株式会社 クロツクパルス再生回路
US4146840A (en) * 1978-01-31 1979-03-27 Harris Corporation Technique for obtaining symbol timing for equalizer weights

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028626A (en) * 1973-01-18 1977-06-07 Hycom Incorporated Digital data receiver with automatic timing recovery and control
US3868603A (en) * 1973-03-09 1975-02-25 Trt Telecom Radio Electr Automatic equalizing arrangement for a data transmission channel
FR2318542A1 (fr) * 1973-03-09 1977-02-11 Trt Telecom Radio Electr Egaliseur autoadaptatif d'un canal de transmission
FR2234718A2 (fr) * 1973-06-25 1975-01-17 Trt Telecom Radio Electr
FR2250447A5 (fr) * 1973-11-06 1975-05-30 Ibm France
US3878468A (en) * 1974-01-30 1975-04-15 Bell Telephone Labor Inc Joint equalization and carrier recovery adaptation in data transmission systems
US4071827A (en) * 1975-12-09 1978-01-31 Nippon Electric Co., Ltd. Transversal type automatic phase and amplitude equalizer

Also Published As

Publication number Publication date
GB2034158B (en) 1983-09-07
CH648971A5 (de) 1985-04-15
CA1128160A (fr) 1982-07-20
DE2942139A1 (de) 1980-04-30
FR2439513B1 (fr) 1985-07-12
BE879541A (fr) 1980-02-15
JPS63165933U (fr) 1988-10-28
US4263671A (en) 1981-04-21
SE7908626L (sv) 1980-06-05
GB2034158A (en) 1980-05-29
JPS5591240A (en) 1980-07-10
SE436960B (sv) 1985-01-28

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Legal Events

Date Code Title Description
ST Notification of lapse